Yo-yo



FIG. 1 is a perspective view of a yo-yo showing our new design;

FIG. 2 is a front elevational view thereof, the rear elevational view being identical; and,

FIG. 3 is a side elevational view thereof, all sides appearing the same.

The portions shown in broken lines are for illustrative purposes only; and form no part of the claimed design. 

The ornamental design for a yo-yo, as shown and described. 